In this paper we explore differences in prosodic rhythm between two English speech communities in rural Southern Alberta, Canada: speakers of Blackfoot First Nation descent and those of settler descent. Using the Variability Index (VI), we show that there are statistically significant differences between English speakers of settler descent and those of Blackfoot descent, where those of Blackfoot descent have a higher VI, that is, they are further along the stress-timing continuum than those of settler descent. We hypothesize that these differences are due to language transfer effects stemming from the community's original Blackfoot phonology which were present in their L2 English when the community norm shifted primarily to English, and that the historical, social, and geographical isolation of Blackfoot people in Southern Alberta has contributed to the development of a new local Blackfoot English norm.